Sometimes a pencil and paper beats a screen. The PuzzleCraft printable Sudoku maker builds clean, ink-friendly sheets in any difficulty, ready to print or save as a PDF.
Every puzzle can be printed or saved as a PDF with a separate answer key. Choose 1, 2, 4 or 6 puzzles per page, switch on Large Print for extra-big squares and numbers, or build a Sudoku book of 10 to 50 puzzles with a cover page and all the answers at the back.
How it works: every PuzzleCraft Sudoku is built from scratch by a generator that fills a complete 9×9 grid and then removes numbers one at a time, checking with a solver after every removal that exactly one solution remains. You will never get a puzzle that needs guessing or has two answers.
Difficulty is rated by the solving techniques a puzzle needs, not just by how many numbers are given. Easy puzzles fall to singles alone. Medium adds naked pairs and pointing. Hard needs triples and box/line reduction. Expert asks for advanced patterns such as the X-Wing and XY-Wing.
Teachers use the 4- and 6-per-page layouts for quick classroom challenges, and puzzle fans print a stack for the train or a waiting room.